NDLI: No evidence of intrinsic reproductive isolation between two reciprocally non-monophyletic, ecologically differentiated mountain plants at an early stage of speciation

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No evidence of intrinsic reproductive isolation between two reciprocally non-monophyletic, ecologically differentiated mountain plants at an early stage of speciation

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No evidence of intrinsic reproductive isolation between two reciprocally non-monophyletic, ecologically differentiated mountain plants at an early stage of speciation

Content Provider	Springer Nature Link
Author	Bertel, Clara Hülber, Karl Frajman, Božo Schönswetter, Peter
Copyright Year	2016
Abstract	Adaptation to dissimilar habitats can trigger phenotypic and genetic differences between populations, which may, in the absence of gene flow, ultimately lead to ecological speciation. Reproductive isolation of diverging populations is a critical step at the onset of speciation. An excellent example for exploring the extent of reproductive isolation at early stages of speciation is provided by Heliosperma pusillum and H. veselskyi (Caryophyllaceae), two reciprocally non-monophyletic, ecologically differentiated species from the Alps. Interspecific gene flow—as revealed by recent genetic studies—is rare even between geographically close populations. Cross pollinations and fitness experiments revealed no evidence of intrinsic reproductive barriers, since fitness parameters measured under uniform conditions were not lower in inter- than in intraspecific crosses. Further, morphometric analyses of the offspring clearly showed that the differentiation of parental species is heritable. As parental phenotypes are likely adaptive, the intermediate morphology of hybrids may lead to reduced hybrid fitness in parental habitats. Altogether, H. pusillum and H. veselskyi provide an increasingly well characterised model system offering exciting insights into early stages of ecological speciation.
Starting Page	1031
Ending Page	1042
Page Count	12
File Format	PDF
ISSN	02697653
Journal	Evolutionary Ecology
Volume Number	30
Issue Number	6
e-ISSN	15738477
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-10-18
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Controlled cross-pollinations Ecological speciation Ecotypes Heliosperma pusillum Homoploid non-hybrid speciation Incomplete reproductive isolation Speciation continuum Evolutionary Biology Ecology Plant Sciences Animal Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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